Is everyone's Media Player working just fine? Mine has suddenly stopped displaying album data, so instead of showing, say 'Bert Kämpfert - Greatest Hits - 1995' with all the track tiles, mine now says 'Unknown artist, unknown album, unknown date' with 'tracks 1 to 17' or whatever. Only albums I have previously played on this PC show album data, which has been stored in a cache under Media Player.

I have been relying heavily on the album data in order to copy+paste the tracks when adding any CD, and it doesn't seem worth adding any new CDs until this is sorted.

I got a PC guy round and he couldn't find any problem with the installation. He managed to delete and reinstall Media Player, although it hasn't been updated since it was first installed. He went home with a few CDs of mine to try (he's too young to have ever played a CD), and reported back that they all showed full album data. I then took the CDs round to my old mate and the full album data showed up immediately. He's running Win 10 with a similar version and the same 'build' so I have to conclude the problem is in my machine, but I have no idea where.